Wow, I think we have a winner - TNG before DS9.
Also, egads, so many Trekkies here! I don't think any other series has prompted so many quick replies from so many people.
And yep, I do plan on looking into Babylon 5 at some point. But probably after I've gorged myself on Star Trek. I'm thinking maybe do TNG and DS9, then take a break before trying out the original series and that new Enterprise series. So much sci-fi to watch!
Oh, and EFB, nope, I haven't reached that episode yet. You started watching Voyager a fair bit before I did, I think. A month or two earlier maybe? Except if I recall, you've been watching it on TV, whereas I have the DVDs... So I may yet overtake you! Mwuahaahahaha! (Don't worry - I avoid giving spoilers, because I hate getting spoilers myself. Nobody in this thread has spoiled anything for me just yet, mind.)
Oh, and Cobra - the Fear and Tuvix episodes really unsettled me. Again, not going to give spoilers, but they definitely made me think. Tuvix moreso than the Fear episode.